| Action Date |
Action |
Description |
DEC Staff |
| 9/1/1995 |
Update or Other Action |
(Old R:Base Action Code = RI - Remedial Investigation). Action date used is the date of the Air Force Relative Risk Evaluation Worksheet, which indicates the site is in the RI phase. |
Former Staff |
| 2/5/1997 |
Site Added to Database |
Site added by Shannon and Wilson. See also Reckey 198931X902504. |
S&W |
| 10/5/1999 |
Update or Other Action |
RI/FS complete AF anticipated No Further Remedial Action Planned at this site. |
Rielle Markey |
| 4/10/2002 |
Meeting or Teleconference Held |
Staff participated in RAB meeting in Nuiqsut re: Oliktok site. Air Force is planning to complete a magnetic survey and sampling of the dock storage, old dump site, and former landfill area as well as survey out on the sea ice as much as possible. The RAB indicated there was extensive debris in the sea off the DEWline property because in the winter the waste was pushed out onto the ice. |
Ann Farris |
| 10/16/2002 |
Meeting or Teleconference Held |
Staff participated in RAB meeting in Nuiqsut re: Oliktok site. Air Force completed the EM survey and sampling effort at the former dump site locations along the beach. Screening tools indicated fuel was present everywhere, however that may be due to moisture interference. The report is expected in November. Next RAB meeting is January 14th. |
Ann Farris |
| 2/21/2003 |
Update or Other Action |
ADEC reviewed and commented on a Focused Remedial Investigation (RI) Report for the Oliktok Long Range Radar Site. The RI focused on several former dump sites that are experiencing significant erosion. The Air Force completed an interim remedial action in 2001 to temporarily stabilize the dump sites and are now trying to determine an appropriate final remedial action. The RI work delineated the full extent of buried debris so cost of excavation could be more accurately estimated. |
Ann Farris |
| 3/4/2003 |
Site Number Identifier Changed |
Changed the Region from 36 to 31. |
Former Staff |
| 9/4/2003 |
Site Number Identifier Changed |
Changed Workplan from X9 to X1 because it appears there are no hazardous substances above cleanup levels at this site. |
Former Staff |
| 9/17/2003 |
Site Characterization Workplan Approved |
Staff completed review of the Draft Oliktok Long Range Radar Site Remedial Investigation/Feasibility Study Work Plan. This work plan details field work designed to determine if there is mobile contamination existing at the old dump sites that are located along the Beaufort Sea. In addition, the plan proposes an erosion study of the area to determine the cost effectiveness of removing these dump sites versus attempting to stabilize them. |
Ann Farris |
| 8/14/2004 |
Site Characterization Report Approved |
Staff reviewed the final remedial investigation/Feasibility Study for Sites LF001, ST003, and LF002 dated July 2004. A geophysical survey, an erosion study, and sampling were completed. There is a significant amount of debris buried at this site and the erosion study indicated the area has a high erosion potential. The recommended action is complete excavation of the landfill contents and any impacted soil that may be associated with it. A proposed plan/decision document for this site is expected in 2005 for a removal in 2006. |
Ann Farris |
| 10/13/2004 |
Meeting or Teleconference Held |
Staff participated in RAB meeting in Nuiqsut re: Oliktok site. Samples were collected at all 10 sites during summer 2004. Results of the 2004 Oliktok Offshore Debris Survey of Navigational Hazards will soon be available in a report. Anticipated Schedule for Oliktok: 2005 Proposed plan and decision document, 2006 Demolition and debris cleanup, 2006 Clean up of any remaining contaminated soils. |
Emily Youcha |
| 2/16/2005 |
Meeting or Teleconference Held |
Staff participated in a meeting with the 611th Air Force and their contractor to discuss the 2005 Remedial Investigation/Feasibilty Study (RI/FS). Preliminary recommended action is landfill removal followed by disposal or treatment of waste. |
Emily Youcha |
| 7/29/2005 |
GIS Position Updated |
Acquired by Topozone. |
Emily Youcha |
| 7/29/2005 |
Meeting or Teleconference Held |
Staff participated in a meeting with the Air Force Peer Review Team. The peer review team saw no need to re-evaluate the site and the recommendation for landfill removal remains the same. |
Emily Youcha |
| 7/29/2005 |
Meeting or Teleconference Held |
Contaminated Sites staff is working with the Air Force on creating a template for ecological and human health risk assessments covering six sites across the North Slope, including this site. The Air Force determined it needs to conduct base-line risk assessments at these sites prior to making cleanup decisions on them. Developing a template is an effort to make the process more efficient. |
Emily Youcha |
| 8/19/2005 |
Update or Other Action |
Contaminated sites participated in a site visit to the Oliktok station with BLM and Air Force representatives. |
Emily Youcha |
| 8/22/2005 |
GIS Position Updated |
Staff acquired new coordinate using Garmin GPS 76 during recent site visit. |
Emily Youcha |
| 12/8/2005 |
Meeting or Teleconference Held |
Staff attended the Restoration Advisory Board meeting in Barrow and provided a summary of the current activites at the site. |
Emily Youcha |
| 2/28/2006 |
Site Characterization Report Approved |
Diesel-range organics (DRO) and residual-range organics (RRO) were found in the landfill soil above Method One soil cleanup standards for the Arctic Zone. RRO and PCBs were detected above Method Two soil cleanup standards for the Arctic Zone. Benzene, toluene, ethylbenzene, and xylenes (BTEX) were detected in the soil, but concentrations were below soil cleanup standards. Additionally, coastal erosion is occurring at this site and this erosion has resulted in exposed debris and unquantifiable contamination releases onto the beach from the landfill. Although this characterization effort is adequate for the current conceptual site model scenario, it cannot adequately assess future scenarios due to unpredictable future releases from the eroding landfill. |
Emily Youcha |
| 3/21/2006 |
Update or Other Action |
Staff received the draft proposed plan of removal for this site and provided comments to the Air Force. |
Emily Youcha |
| 4/21/2006 |
Proposed Plan |
Staff reviewed and approved the Proposed Plan for nine environmental restoration program sites (LF01, ST03, ST04, SS05, ST06, SS07, ST08, SS09, and SS10) at Oliktok Long Range Radar Station. The Proposed Plan was received on March 29, 2006. |
Emily Youcha |
| 5/26/2006 |
Update or Other Action |
Contaminated Sites staff recently obtained term contractor review of a draft Air Force North Slope Risk Assessment Work Plan (RAWP). Comments were received from the term contractor, and a comment review teleconference was held with the term contractor risk assessor on 5/10/06. The RAWP seeks to develop risk based cleanup levels based on exposure pathways for categories of sites (e.g., garage sites) at Air Force radar stations in the north slope region. The work plan is generally well written, but some of the key items that need clarification are how data gaps will be handled at individual sites; determination of background levels for organics and inorganics; how it will be determined whether a large water body is potentially affected by a site; and how toxicity will be determined for trichloroethylene. |
Emily Youcha |
| 7/11/2006 |
Meeting or Teleconference Held |
Staff performed a site visit to Oliktok with the North Slope Risk Assessment team. No sites were included in the N Slope Risk Assessment template for Oliktok but specific attention was paid to the Garage site. |
Emily Youcha |
| 7/13/2006 |
Update or Other Action |
Staff was informed by the Air Force that the Proposed Plans for Oliktok will be changed due to the upcoming performance-based contract. The Air Force will update the Proposed Plans to include only the no further action (NFA) sites and will also write the Record of Decision for the NFA sites. The performance-based contractor will write the Proposed Plan and Record of Decision for any site with further action, monitoring, or institutional controls. This could change the anticipated remedies for the sites. Any compliance-funded sites will be removed from the Proposed Plans (such as the two landfills, LF01 and LF02) and cleaned up during the performance-based contract for building demolition and debris removal under a DEC approved cleanup workplan. Staff will issue a letter to the Air Force rescinding our agreement with the previous draft Proposed Plans and request additional review of the new Proposed Plan and also request frequent communications with the contractor and the Department of Defense contracting officer during the Proposed Plan and Decision Document process. |
Emily Youcha |
| 7/13/2006 |
Update or Other Action |
Contaminated Sites staff was informed by an Air Force contractor that Pacific Air Forces issued a policy regarding the cleanup of landfills. Apparently, only compliance funding (rather than the Defense Environmental Restoration Account) can be used for the cleanup of the landfills, even if hazardous substances are present in the landfill. Due to the lack of compliance funding, many landfills are not programmed for clean up until 2013 at the earliest, including the Point Lonely DEW Line landfill. However, the Air Force project manager for Oliktok believes compliance funds for removal of the Oliktok eroding landfill are secured and available for the 2007 performance-based contract cleanup. |
Emily Youcha |
| 5/18/2007 |
Document, Report, or Work plan Review - other |
Reviewed and sent comments on of a draft work plan titled Oliktok Long Range Radar Station Work Plan for Site Activities. DEC received this work plan on May 11, 2007. Review included review of the Work Plan, Field Sampling Plan, and the Waste Management Plan. Review found significant inadequacies with work plan including lack of confirmation sampling for PCB areas, and lack of information on identification of contaminants during excavation of LF001 and LF002, lack of information on segregation of landfill soil and wastes, and lack of information on how different wastes streams will be staged, stored, and managed. Contractor was already in the field conducting work before the plan was received. (Note: a final work plan was never submitted to DEC) |
Tamar Stephens |
| 5/25/2007 |
Update or Other Action |
Received e-mail from contractor with draft approach to confirmation sampling and backfilling at LF001. E-mail response sent by Tamar Stephens same day that proposed confirmation sampling was insufficient; identified required number of confirmation samples as per regulations and guidance documents. |
Tamar Stephens |
| 5/30/2007 |
Document, Report, or Work plan Review - other |
Contractor send revised waste management plan by e-mail on 5/29; DEC reviewed and sent response on 5/30 that it was acceptable. |
Tamar Stephens |
| 6/25/2007 |
Meeting or Teleconference Held |
Tamar Stephens attended Restoration Advisory Board meeting in Nuiqsut. |
Tamar Stephens |
| 8/22/2007 |
Document, Report, or Work plan Review - other |
Reviewed and sent comments on the Work Plan for Construction of On-site Cell and Closure of LF001, LF002, and SS010 Excavations (August 2007). DEC received this work plan on August 14, 2007. This work plan describes the plan for an on-site soil disposal cell, and plans for closure of three excavation areas, the Old Landfill (LF001), the Dump Site (LF002), and a tundra area with polychlorinated biphenyls (PCBs) adjacent to the Garage Site (SS010). Approximately 5,000 cubic yards of soil within the footprint of the LF001 excavation was found to have PCB contamination above the cleanup level. The purpose of the plan to construct a soil cell is to move the soil to a more secure location for long-term storage pending determination of a final remedy for this soil. ADEC has not yet received a cleanup report for work done at the site; thus, references to “closure” in the plan are interpreted to mean “backfilling the excavations” rather than regulatory closure. Site closure determinations will be made after submittal and review of all required information. |
Tamar Stephens |
| 10/3/2007 |
Document, Report, or Work plan Review - other |
Reviewed and sent comments on draft Proposed Plan for ST006, SS010, SS009a and SS09b; comments were sent by e-mail, with an attached copy of the draft Proposed Plan showing DEC markup. |
Tamar Stephens |
| 10/22/2007 |
Interim Removal Action Approved |
Reviewed and approved a final work plan titled Work Plan for Time Critical Removal of Stockpile Soils from LF001 and LF002, Oliktok Long Range Radar Station, Alaska. DEC received this report electronically on October 12, 2007 and received hard copy on October 15, 2007. DEC approved the project in an e-mail on October 12, 2007. Letter on 10/22/2007 is to follow up the e-mail approval with a formal approval letter. The purpose of this time critical removal action is to relocate PCB-contaminated soil that is currently stockpiled within the foot prints of an old landfill, LF001 and an old dump, LF002 from these locations, where they are vulnerable to erosion from storm activity, to a more secure long-term stockpile location pending a permanent remedy for soil treatment or disposal. |
Tamar Stephens |
| 11/26/2007 |
Document, Report, or Work plan Review - other |
Reviewed and sent comments on draft Decision Documents for CERCLA Site ST003, and for Non-CERCLA Sites ST004, SS005, SS007, and ST008 at the Oliktok Long Range Radar Station. DEC received this set of draft decision documents on November 5, 2007. |
Tamar Stephens |
| 12/11/2007 |
Risk Assessment Report Approved |
ADEC received the Final Risk Evaluation Report – Alaska North Slope Radar Installation Sites on November 6, 2007. This report meets the requirements of the ADEC Contaminated Sites Program Risk Assessment Procedures Manual, adopted by reference in 18 AAC 75.340. An approval letter was sent to Dave Cook, Program Manager HQ PACAF/A7NR, on December 10, 2007
This project identified categories of sites that are common on remote Air Force installations in the North Slope region of Alaska and developed conceptual site models and human health and ecological risk based screening levels for four of these categories: garage sites, fuel storage sites, non-fuel storage sites, and transformer sites. The project developed templates for conducting human health and ecological risk evaluations for these categories and performed a risk evaluation as a test case for one example of each type of site. The final report contains guidance on applying the process to other North Slope region sites. It may be used on a site-specific basis as a tool to assist in assessing potential risks posed by North Slope Air Force installation sites.
|
Tamar Stephens |
| 1/15/2008 |
Document, Report, or Work plan Review - other |
Reviewed and sent comments on Revised Draft Time Critical Removal Action Report, November 2007. ADEC received this report on November 30, 2007. This report describes the construction of an on-site soil stockpile for PCB-impacted soils from two locations at Oliktok, the Old Landfill (LF001) and the Dump Site (LF002). The stockpile was constructed along the west side of the access road between the main facility and the runway. The stockpile base was constructed of a geo-fabric stabilization liner, with approximately 1 foot of clean gravel fill placed over the liner. The clean gravel was obtained from the east end of the runway. Soil containing low levels of polychlorinated biphenyls (PCBs) was moved from the LF001 and LF002 areas to the new stockpile area. Estimated volumes of soil placed in the stockpile were 3,500 cubic yards from LF001 and 800 cubic yards from LF002. |
Tamar Stephens |
| 4/28/2008 |
Document, Report, or Work plan Review - other |
Approved final Work Plan for Closure Activities at LF001 and LF002, Oliktok Long Range Radar Station, Alaska. ADEC received the final work plan on April 25, 2008. Work plan is approved with the following exception. As agreed upon during a comment resolution meeting on April 22, the soil cell, designated at LF001a, must be completed to design standards approved by ADEC; the design will be submitted to ADEC under separate cover, and approval for this element of the field work will be provided in a separate letter. This work plan provides procedures for conducting the following activities. (1) Additional excavation will be performed at two former coastal landfills at Oliktok, LF001 and LF002. Following removal of solid waste from these locations during spring of 2007, confirmation samples from the floor of each landfill showed the presence of polychlorinated biphenyls (PCBs) at concentrations exceeding the cleanup level of one milligram per kilogram (mg/kg). Multi-incremental sampling will be performed to confirm cleanup. The landfill excavations will be backfilled with clean gravel after confirmation sampling shows that the cleanup level for PCBs has been met. (2) Non-soil wastes that are currently stored in the Air Freight Terminal will be transported off site for disposal at Burlington Environmental, Inc. in Kent, Washington. (3) The additional soil that is excavated from the landfill locations, and soil that is currently stockpiled inside the Air Freight Terminal, will be added to the stockpile of soil constructed during the time critical removal action in fall, 2007. This stockpile is located adjacent to the south side of the access road between the facility and the runway, approximately mid-way along the road, directly opposite of a permitted asbestos cell. This stockpile will be completed as a soil cell designed to monofill standards consistent with 18 AAC 60 Solid Waste Management regulations, to ensure protection of human health and the environment pending evaluation of alternatives for permanent treatment and/or disposal of this soil and funding to implement a final remedy. |
Tamar Stephens |
| 6/12/2008 |
Document, Report, or Work plan Review - other |
Reviewed and approved Revised Final Work Plan for Closure Activities at LF001 and LF002, Oliktok LRRS. ADEC approved this work plan in a letter dated April 28, 2008. However, the approval did not include approval of the soil cell design, which would be submitted separately as an appendix to the work plan. ADEC received the draft soil design on May 12, 2008 found it adequate with regard to the design of the soil cell, but directed the addition of thermal monitoring and active zone water monitoring to the post closure plan. The additional post closure activities are described in Appendix F of the Revised Final Work Plan for Closure Activities at LF001 and LF001, Oliktok LRRS, and the soil cell design adequately meets the design standards found in the Solid Waste Management Regulations in 18 AAC 60.430. |
Tamar Stephens |
| 1/20/2009 |
Document, Report, or Work plan Review - other |
Reviewed and sent comments on draft Environmental Baseline Survey, Air Freight Terminal Building. DEC received this report on November 17, 2008. This report describes an investigation of the Air Freight Terminal that includes review of historical Federal, State, and local documents, interviews of people knowledgeable about past uses of the facility, a visual survey of the facility, and environmental sampling of the floor of the facility. Sampling of the gravel floor was performed after stockpiled soil from LF001 was removed from the building. |
Tamar Stephens |
| 9/3/2009 |
Document, Report, or Work plan Review - other |
Reviewed and sent comments on Draft Remedial Action Report for the Oliktok Long Range Radar Station (LRRS). DEC received this report on March 3, 2009. This report describes cleanup activities performed at four sites and construction of one long-term soil storage cell at the Oliktok Long Range Radar Station in 2007 and 2008. (1) Old Landfill (LF001) and Dump Site (LF002) – LF001 had experienced erosion of some contents into the ocean and LF002 was threatened with erosion resulting from storm action. These two sites were completely excavated and backfilled with clean gravel. (2) Garage (SS010) - Polychlorinated biphenyl (PCB) contaminated soil adjacent to garage building was excavated, fencing to prevent access and exposure to soil underneath the garage was inspected, and warning signs were installed. (3) Module Train Spill (ST006) - A small area with PCB contaminated soil beneath a transformer stand was capped and a warning sign was installed. (4) Soil Cell (LF001a) – A soil cell was constructed for long-term storage of PCB-contaminated soil excavated from LF001, LF002, and SS010. The soil cell was constructed to drilling waste monofill standards. |
Tamar Stephens |
| 9/4/2009 |
Document, Report, or Work plan Review - other |
Reviewed and approved final report titled Environmental Baseline Survey, Air Freight Terminal Building for the Oliktok Long Range Radar Station. DEC previously reviewed the draft version of this report and sent comments in a letter dated January 20, 2009. DEC received the final report on February 5, 2009. This report describes an investigation of the Air Freight Terminal Building that includes review of historical Federal, State, and local documents, interviews of people knowledgeable about past uses of the facility, a visual survey of the facility, and environmental sampling of the floor of the building. According to this report: (1) Two diesel spills are documented to have occurred near the building. In 1978, a 300 gallon spill of diesel occurred on the pad near the east side of the hangar. This area was identified as site SS005 and remaining fuel contamination is below the arctic zone Method Two cleanup levels. A smaller spill, estimated as less than 55 gallons of diesel, occurred near the entrance of the hangar on October 29, 2006; the spill was cleaned up the following day. (2) Four 275 gallon above ground storage tanks were used for storing diesel fuel in the past, and one 500 gallon above ground storage tank was used for non-potable water. These tanks have all been removed. (3) An asbestos survey and abatement were performed in 2006, and all asbestos-containing material was removed from the hangar. (4) The hangar was inspected for polychlorinated biphenyl (PCB) amended paint, and PCB amended paint was abated and removed from two furnace rooms during 2006. One transformer was also removed in 2006. (5) Paint was removed from the building in 2006. It was not tested to confirm the presence of lead, but lead-based paint was likely used in the past. With removal of the paint, no lead-based paint remains. |
Tamar Stephens |
| 2/17/2010 |
Meeting or Teleconference Held |
Tamar Stephens attended Restoration Advisory Board meeting in Nuiqsut. |
Tamar Stephens |
| 4/30/2010 |
CERCLA Remedial Action Completion Report |
Approved the Final Remedial Action Report for the Oliktok Long Range Radar Station. DEC received this report on April 6, 2010. This report describes cleanup activities performed at four sites and construction of one long-term soil storage cell at the Oliktok Long Range Radar Station in 2007 and 2008. Cleanup actions at LF001 consisted of the following activities. (1) The eroding landfill Old Landfill (LF001) and the nearby Dump Site (LF002) were completely excavated and backfilled with clean gravel. Solid waste and hazardous waste (such as batteries and electronic components containing polychlorinated biphenyls (PCBs)) were shipped off site for disposal in permitted facilities. Soil known to have petroleum and PCB contamination was excavated and stored in the hangar. Except for small volumes of soil that were removed due to gross contamination, the remainder of the soil from these two sites was stockpiled at one end of LF001 to be used for backfill. Sampling of the stockpiled soil showed it to have concentrations of PCB above the cleanup level of 1 milligram per kilogram making it unsuitable for backfill. This soil was removed during a time critical removal action in fall of 2007 from an area vulnerable to erosion from storm action, and is currently stored in the LF001a Soil Cell. |
Tamar Stephens |
| 5/5/2010 |
CERCLA FS |
Approved final Oliktok Long Range Radar Station Final Feasibility Study for LF001A. This Feasibility Study identifies and evaluates three remedial alternatives for the soil in the LF001A Soil Cell and evaluates the alternatives based on nine criteria required under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA). Alternative 1- No Further Action. Alternative 2- Containment, Land Use Controls, and Long-Term Monitoring. Alternative 3- Source Removal and Off Site Disposal. The soil cell was constructed with a freeze-back design to keep the contents frozen and immobile. With regular monitoring and maintenance the LF001A Soil Cell can keep the soil contained and will protect human health and the environment from exposure to contaminants in the soil indefinitely into the future. This alternative can be effective as long as the Air Force maintains an active presence at the Oliktok facility. There are a number of uncertainties associated with this remedy.
• If the Air Force should cease to have an active presence at Oliktok in the future, this remedy would need to be revisited, and it is likely that the Air Force would need to remove the contents of the LF001A Soil Cell at that time. Thus, this remedy may simply delay the higher costs associated with alternative 3.
• This remedy has the drawback that the Soil Cell will require monitoring and maintenance in perpetuity.
• This alternative would also need to be revisited if climate change or other factors in the future result in changes, such as thawing of permafrost, that threaten the integrity of the Soil Cell.
If this remedy is implemented, DEC will require visual inspection of the LF001A Soil Cell and maintenance of the cover at regular intervals, and five-year reviews for as long as it is present.
|
Tamar Stephens |
| 6/29/2010 |
Document, Report, or Work plan Review - other |
Reviewed and sent comments on draft Proposed Plan for LF001a Soil Cell. |
Tamar Stephens |
| 8/5/2010 |
Document, Report, or Work plan Review - other |
Reviewed and sent comments on Draft Proposed Plan – LF001, LF002, ST006, SS010, SS009a, and SS009b, Oliktok Long Range Radar Station. |
Tamar Stephens |
| 9/2/2010 |
Document, Report, or Work plan Review - other |
Reviewed and sent comments on Draft Environmental Long Term Monitoring and Maintenance Work Plan and Draft Sampling and Analysis Plan (SAP). |
Tamar Stephens |
| 9/14/2010 |
Site Visit |
Contaminated sites staff Tamar Stephens and USAF remedial project manager Robert Johnston conducted a site visit and inspection. |
Tamar Stephens |
| 11/10/2010 |
Meeting or Teleconference Held |
Tamar Stephens attended Restoration Advisory Board meeting in Nuiqsut. |
Tamar Stephens |
| 1/6/2011 |
Document, Report, or Work plan Review - other |
Sent approval letter for Final Environmental Long-Term Monitoring and Maintenance Work Plan. This work plan describes plans for conducting inspection and monitoring activities at four sites at Oliktok, to include visual inspections of two former landfill/dump sites, LF001 and LF002; visual inspection of the cap placed over polychlorinated biphenyl (PCB) soil below a transformer stand at ST006; and visual inspection, collection of temperature data, and groundwater and/or surface water sampling at the LF001a Soil Cell. DEC reviewed the draft work plan, found it generally acceptable, and asked for clarification of a few items. Responses to these comments were received and accepted by DEC via e-mail but the final work plan was not printed in time to reach DEC prior to the field work. DEC staff Tamar Stephens gave approval for field work to proceed, and was present at the Oliktok LRRS during field activities on September 14, 2010. DEC received a printed copy of the final work plan on October 1, 2010, after completion of the field work. Approval letter was sent on 1/6/2011 to document that the work plan was approved as of the date of the field work. |
Tamar Stephens |
| 1/6/2011 |
Document, Report, or Work plan Review - other |
LTM Report: Reviewed and sent comments on the draft Technical Project Report (November 2010) for the Oliktok Long Range Radar Station (LRRS), Alaska. DEC received this report on December 16, 2010. This report describes inspection and long term monitoring activities performed on September 14, 2010, at four sites at the Oliktok LRRS: LF001, LF002, ST006, and LF001a. |
Tamar Stephens |
| 1/6/2011 |
Document, Report, or Work plan Review - other |
Reviewed and sent comments on draft Technical Report. This report describes inspection and monitoring activities performed on September 14, 2010, at four sites at the Oliktok LRRS: LF001, LF002, ST006, and LF001a. |
Tamar Stephens |
| 3/9/2011 |
Meeting or Teleconference Held |
Tamar Stephens attended public meeting in Nuiqsut. Air Force presented Proposed Plan for Oliktok sites LF001, LF002, LF001a, ST006, SS009a, SS009b, and SS010. |
Tamar Stephens |
| 3/29/2011 |
Meeting or Teleconference Held |
The Air Force presented the Proposed Plan for sites LF001, LF002, SS010, LF001a, ST006, SS009a, and SS009b in a public meeting in Nuiqsut on March 29, 2011. Tamar Stephens from ADEC attended. The public comment period is March 29 through April 29, 2011. |
Tamar Stephens |
| 4/15/2011 |
Document, Report, or Work plan Review - other |
Final LTM Report Aproved: Sent approval letter for Final Technical Project Report for the Oliktok Long Range Radar Station on March 10, 2011. This report describes inspection and monitoring activities performed on September 14, 2010, at four sites at the Oliktok LRRS: LF001, LF002, ST006, and LF001a. LF001 and LF002 were visually inspected and photographed on September 14, 2010. LF001 showed some settling at the eastern side of the site and some surface erosion in the southeast corner. Part of a plastic liner is exposed at the southeast corner; the liner was installed as part a shoreline erosion control measure during a past interim action. The report recommends continuing with visual inspection and photo documentation at these sites. DEC concurs with the recommendation. |
Tamar Stephens |
| 4/15/2011 |
Document, Report, or Work plan Review - other |
Approved Final Technical Project Report for inspection and monitoring activities performed at LF001, LF002, ST006, and LF001a on September 14, 2010. |
Tamar Stephens |
| 4/28/2011 |
CERCLA Proposed Plan |
Sent approval letter for the Final Proposed Plan, LF001, LF002, SS010, LF001a, ST006, SS009a, and SS009b, Oliktok Long Range Radar Station, Alaska. DEC reviewed and commented on the draft Proposed Plan and received the final Proposed Plan on March 22, 2011. The Proposed Plan was presented in a public meeting in Nuiqsut on March 29, 2011, with a 30-day public comment period from March 29 to April 29, 2011. The Proposed Plan describes each site, summarizes past sampling results and cleanup actions, describes the remedial alternatives that were evaluated, and presents a preferred remedial alternative. The Air Force conducted various cleanup activities at these sites in 2007. In summary, the preferred alternatives presented in the Proposed Plan are as follows. LF001 (Old Landfill) and LF002 (Dump Site) Confirmation sampling following the 2007-2008 removal action detected polychlorinated biphenyls (PCBs) remaining in the soil on the floor of both excavations above the cleanup level of 1 milligram per kilogram (mg/kg). The Proposed Plan recommends land use controls to prevent construction or excavation activities. The floor of each excavation is below sea level and not anticipated to erode into the ocean. LF001a was constructed in 2007 and completed in 2008, as part of an interim removal action to remove PCB-contaminated soil from LF001 and LF002, where the soil was at risk of erosion, and store it in a more secure location. The soil cell was designed in accordance with the standards of a freeze-back industrial waste or drilling waste monofill as per 18 AAC 60 Solid Waste Management regulations. The Proposed Plan recommends maintaining the soil cell with land use controls, long-term monitoring, and maintenance as needed for the cap. |
Tamar Stephens |
| 4/28/2011 |
Document, Report, or Work plan Review - other |
Reviewed Final Offshore Debris Removal Report. This report describes removal of underwater offshore debris performed in 2007 at the Oliktok Long Range Radar Station. This action was undertaken in order to remove debris that was identified in a 2004 survey as posing a potential navigation hazard. The 2004 survey identified 75 locations with apparent debris. The 2007 Offshore Debris Removal Report describes 34 offshore locations from which debris was removed during winter of 2007. Objects were removed by using an excavator to dig through the ice; recovered objects were placed in a loader and transported to the shore to stage for disposal. This report describes the debris removed during this action as including whole and partial drums, a large concrete block, heavy equipment components, metal cable, a metal truck bed, and other metal objects and scrap metal. According to the report, debris was not removed from the other locations either because debris was not found at a given location, indicating it may have shifted to another location, or because the ice was not suitable to support the excavator and loader. The remaining debris continues to pose a navigational hazard. Some of the debris likely results from past erosion of landfill contents at Oliktok. At a public meeting in Nuiqsut on March 29, 2011, several residents expressed concern about underwater debris. Residents described seeing underwater debris more recently than the 2007 removal action and described incidents in which boats struck underwater debris. The report recommends that the Air Force consider conducting a follow-up survey to evaluate the present extent of remaining anomalies and navigational hazards. DEC concured with this recommendation and further recommended a timely removal of navigational hazards identified during the follow-up survey. |
Tamar Stephens |
| 7/1/2011 |
Document, Report, or Work plan Review - other |
Draft LTM Work Plan: Reviewed and sent comments on draft Environmental Long Term Monitoring and Maintenance Work Plan. |
Tamar Stephens |
| 7/11/2011 |
Document, Report, or Work plan Review - other |
Reviewed and sent comments on draft Environmental Long Term Monitoring and Maintenance Work Plan for 2011. |
Tamar Stephens |
| 8/18/2011 |
Document, Report, or Work plan Review - other |
Sent approval letter for final Environmental Long Term Monitoring and Maintenance Work Plan for 2011. This work plan describes plans for conducting monitoring activities at four sites at Oliktok. Activities will include visual inspections of two former landfill/dump sites, LF001 and LF002; visual inspection of the cap placed over polychlorinated biphenyl (PCB) soil at ST006; and visual inspection, collection of temperature data, and groundwater and/or surface water sampling at the LF001a Soil Cell. Work is planned for September, 2011. |
Tamar Stephens |
| 8/18/2011 |
Document, Report, or Work plan Review - other |
Final LTM Work Plan: Approved the final draft Environmental Long Term Monitoring and Maintenance Work Plan. Field work is planned for early September, 2011. |
Tamar Stephens |
| 1/3/2012 |
Document, Report, or Work plan Review - other |
Draft LTM Report: Reviewed and sent comments on draft Technical Project Report, Environmental Long Term Monitoring and Maintenance, for field work performed in September, 2011. |
Tamar Stephens |
| 6/6/2012 |
Document, Report, or Work plan Review - other |
Final LTM Report for 2011: Approved final Final Technical Project Report, Environmental Long Term Monitoring and Maintenance. At LF001, Inspection revealed evidence of surface erosion at the southeast corner and exposed debris along the southern edge of LF001. The report recommends removal and proper disposal of exposed debris along the shoreline to prevent possible erosion into the Beaufort Sea. DEC concurs with this recommendation. |
Tamar Stephens |
| 6/6/2012 |
Document, Report, or Work plan Review - other |
Stephens sent an approval letter for the Final Technical Project Report, Environmental Long Term Monitoring and Maintenance, Oliktok Long Range Radar Station. Stephens previously reviewed the draft report and send comments in a letter on January 3, 2012. This report describes visual inspections and monitoring activities conducted at four sites at the Oliktok Long Range Radar Station during August 26-28, 2011. Visual inspections were performed at the Old Landfill Site (LF001), Dump Site (LF002), Module Train Spill Site (ST006), and the Soil Cell (LF001a). At the LF001a Soil Cell, active zone and surface water samples were collected to evaluate for migration of contaminants and temperature data was collected to evaluate the effectiveness of the freeze-back design. Inspection revealed evidence of surface erosion at the southeast corner and exposed debris along the southern edge of LF001. The report recommends removal and proper disposal of exposed debris along the shoreline to prevent possible erosion into the Beaufort Sea. DEC concurs with this recommendation. |
Tamar Stephens |
| 7/6/2012 |
Document, Report, or Work plan Review - other |
Draft LTM Work Plan: Reviewed and sent comments on draft Work Plan – Environmental Long Term Monitoring and Maintenance for LTM activities planned for 2012. |
Tamar Stephens |
| 8/8/2012 |
Document, Report, or Work plan Review - other |
Stephens sent an approval letter for the final Work Plan – Environmental Long Term Monitoring and Maintenance, Oliktok Long Range Radar Station. Stephens previously reviewed the draft work plan and sent comments in a letter on July 6, 2012. This work plan describes plans for conducting monitoring activities at four sites at Oliktok. Field work is currently planned for September 4-5, 2012. Activities will include: visual inspections of two former landfill/dump sites, LF001 and LF002; visual inspection of the cap placed over polychlorinated biphenyl (PCB) soil at ST006; and visual inspection, collection of temperature data, and groundwater and/or surface water sampling at the LF001a Soil Cell. |
Tamar Stephens |
| 11/20/2012 |
CERCLA ROD Approved |
A Record of Decision (ROD) was signed by John Halverson, Environmental Program Manager, Federal Facilities Section, Contaminated Sites Program, Alaska Department of Environmental Conservation, on 11/16/12 and by U.S. Air Force Colonel Robyn Burk, U.S. Air Force, Commander, 611th Air Support Group, on 11/20/12 for seven sites at the Oliktok Long Range Radar Station: LF001 (Old Landfill), LF002 (Dump Site), SS010 (Garage Site), ST006 (Module Train Spill Sites), SS009a (Diesel Storage Tank Site), SS009b (Fuel Tank Farm Site), and LF001a (Soil Cell). Landfill contents were completely removed in a removal action in 2007. An additional one-foot lift of soil was removed in 2008 to remove PCBs on the floor of the excavation. Following the 2008 removal, the floor of the excavation was below sea level and was backfilled to prevent intrusion of water; confirmation sampling showed PCBs remaining on the floor of the landfill above the cleanup level of 1 mg/kg. The selected remedy for this site is land use controls. |
Tamar Stephens |
| 11/20/2012 |
Institutional Control Record Established |
Land Use Controls were selected as the remedy for this site with the signing of the Record of Decision (ROD) by ADEC on 11/16/2012 and by the U.S. Air Force on 11/20/2012. Land Use Controls (LUCs) are to consist of:
• Visual monitoring of the clean backfill for signs of settlement, subsidence, erosion, or other such events annually;
• Five year reviews will be completed to ensure the remedies remain protective and to determine necessity for continued annual inspections;
• Annual inspections will continue until ADEC approves reduction or discontinuation of visual monitoring;
• Maintaining the integrity of the clean backfill to limit exposure to subsurface soils, including making repairs and preventing run-on or run-off from eroding or otherwise damaging cover material, and restricting excavation or disturbance of the clean backfill;
• Restricting construction or demolition disturbance on top of the site without prior concurrence from ADEC;
• Restricting access and excavation or disturbance of contaminated soil to prevent groundwater contamination or placement of contaminated soil in environmentally sensitive areas;
• Inclusion and documentation of institutional controls (ICs) in the 611th Civil Engineer Squadron (CES) Installation Restoration Program (IRP) Records, Base Master Plan, and appropriate real estate files, including information about current land uses and allowed uses, and geographic extent of the IC boundaries;
• Record a Notice of Environmental Contamination (NEC) in the state land records at the appropriate Department of Natural Resources recording district;
• Submittal of a Performance Report/Annual Inspection Report to ADEC annually;
• Five year review reports will be submitted once every five years after implementation of the remedial action as long as contaminant levels on the site do not allow for unrestricted land use and unlimited exposure;
• Prompt notification to ADEC of LUC deficiency or failure along with corrective measures taken or planned;
• ADEC concurrence for significant changes to use and activity restriction and LUCs and for significant changes; and prior notification to ADEC for transfer of property subject to LUCs.
|
Tamar Stephens |
| 11/29/2012 |
Meeting or Teleconference Held |
Tamar Stephens attended Restoration Advisory Board meeting in Nuiqsut. |
Tamar Stephens |
| 2/22/2013 |
Cleanup Complete Determination Issued |
By law, DEC is required to recover expenses incurred during cleanup, including staff oversight time. Current and former landowners may be liable for state cleanup expenditures.
A Record of Decision (ROD) was signed by John Halverson, Environmental Program Manager, Federal Facilities Section, Contaminated Sites Program, Alaska Department of Environmental Conservation, on 11/16/12 and by U.S. Air Force Colonel Robyn Burk, U.S. Air Force, Commander, 611th Air Support Group, on 11/20/12 for seven sites at the Oliktok Long Range Radar Station: LF001 (Old Landfill), LF002 (Dump Site), SS010 (Garage Site), ST006 (Module Train Spill Sites), SS009a (Diesel Storage Tank Site), SS009b (Fuel Tank Farm Site), and LF001a (Soil Cell). Landfill contents were completely removed in a removal action in 2007. An additional one-foot lift of soil was removed in 2008 to remove PCBs on the floor of the excavation. Following the 2008 removal, the floor of the excavation was below sea level and was backfilled to prevent intrusion of water; confirmation sampling showed PCBs remaining on the floor of the landfill above the cleanup level of 1 mg/kg. No samples were analyzed for other COCs following the 2008 removal, so actual concentrations are not known. The selected remedy for this site is land use controls. |
Tamar Stephens |
| 4/1/2013 |
Update or Other Action |
Final Technical Project Report was recv'd by John Halverson in Anchorage on 3/28/2013 |
Susan Carberry |
| 9/30/2013 |
Document, Report, or Work plan Review - other |
Approved the final work plan for pre-excavation confirmation sampling at the Old Landfill (LF001) site to determine the extent of remaining contamination. Results will be incorporated in the planned 2014 work plan for removal and off-site disposal of contaminated soil. |
Melody Debenham |
| 2/21/2014 |
Document, Report, or Work plan Review - other |
Draft Oliktok Long Range Radar Site, Environmental Long Term Management Technical Project Report, February 2014 |
Debra Caillouet |
| 2/21/2014 |
Document, Report, or Work plan Review - other |
Draft Oliktok Long Range Radar Site, Environmental Long Term Management Technical Project Report, February 2014
LF01 is not included in this although the inspection is required by the ROD |
Debra Caillouet |
| 8/27/2014 |
Site Reopened |
The Air Force has decided to pursue a complete closure of the site. A ROD amendment was approved today describing the planned work. |
Debra Caillouet |
| 8/27/2014 |
CERCLA ROD Approved |
The ROD amendment for complete excavation was approved. |
Debra Caillouet |
| 12/19/2014 |
Institutional Control Periodic Reporting |
Draft 2014 Environmental Long Term Management Technical Project Report for Sites LF001, LF002, ST006 and SS010 Oliktok Long Range Radar Station, December 2014. The report was approved as written. |
Debra Caillouet |
| 3/17/2015 |
Document, Report, or Work plan Review - other |
Major comment was sent to the Air Force on the Draft Remedial Action Work Plan and Summary Report for Soil Removal Activities, Site LF001 – Old Landfill, Oliktok Long Range Radar Station, April 2015 (received February 23, 2015) |
Debra Caillouet |
| 4/23/2015 |
CERCLA Remedial Design/Remedial Action Plan Approved |
Remedial Action Work Plan, LF001—Old Landfill, Oliktok Long Range Radar Station, Oliktok RAWP_04_23_2015_Final_Ecopy
The work plan and UFP-QAPP incorporate acceptable responses to previously supplied comment and is approved for implementation. Please be aware that changes to the work plan are to be submitted for additional approval (18 AAC 75.360).
|
Debra Caillouet |
| 1/29/2016 |
Document, Report, or Work plan Review - other |
Provide brief comments on cleanup report for LF001. With waste documentation, site will be ready for closure. |
John Carnahan |
| 3/2/2016 |
CERCLA Remedial Action Completion Report |
Provide approval of Final LF001 cleanup report. AF will coordinate on providing closure information for final letter. |
John Carnahan |
| 5/19/2016 |
Document, Report, or Work plan Review - other |
Provide approval for Supplemental LTM Workplan for 2016. |
John Carnahan |
| 6/9/2016 |
Cleanup Complete Determination Issued |
The Alaska Department of Environmental Conservation has reviewed the environmental records for the referenced site. The Cleanup Complete Determination letter memorializes the site history, cleanup actions, and standard conditions for long-term site management. No further remedial action is required. |
John Carnahan |
| 6/9/2016 |
Institutional Control Record Removed |
Institutional Controls have been removed. |
John Carnahan |
| 1/17/2017 |
Update or Other Action |
Stephen Krause replaces Lori Roy as the AF RPM for Barter, Bullen, Wainwright, Lisburne, Point Lonely, Oliktok, Lake Louise, Big Mtn and Duncan Canal. |
John Carnahan |
